[PATCH 10/22] PCI: mvebu: Use SET_PCI_ERROR_RESPONSE() when device not found
Naveen Naidu
naveennaidu479 at gmail.com
Mon Oct 11 11:00:00 PDT 2021
An MMIO read from a PCI device that doesn't exist or doesn't respond
causes a PCI error. There's no real data to return to satisfy the
CPU read, so most hardware fabricates ~0 data.
Use SET_PCI_ERROR_RESPONSE() to set the error response, when a faulty
read occurs.
This helps unify PCI error response checking and make error check
consistent and easier to find.
Signed-off-by: Naveen Naidu <naveennaidu479 at gmail.com>
---
drivers/pci/controller/pci-mvebu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index ed13e81cd691..51d61194a31a 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -654,7 +654,7 @@ static int mvebu_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
port = mvebu_pcie_find_port(pcie, bus, devfn);
if (!port) {
- *val = 0xffffffff;
+ SET_PCI_ERROR_RESPONSE(val);
return PCIBIOS_DEVICE_NOT_FOUND;
}
@@ -664,7 +664,7 @@ static int mvebu_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
size, val);
if (!mvebu_pcie_link_up(port)) {
- *val = 0xffffffff;
+ SET_PCI_ERROR_RESPONSE(val);
return PCIBIOS_DEVICE_NOT_FOUND;
}
--
2.25.1
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